By this stage of the 2008 presidential race, four Republican candidates had already established exploratory committees to prepare a run at their party's nomination. This time around, GOP candidates seem content to let someone else make the first move — leaving no clear favorite for the 2012 race. In fact, much of the presidential news thus far has come from seemingly likely contenders in both parties who say they won't run. With the caveat that presidential election history is full of such nay-sayers (President Obama included), here's a list of who's opted out (In article)